Scheduling commands is a feature that you can use through the indifferent broccoli control panel. You'll be able to run any command you can run via RCON automatically at a scheduled time. You can find a full list of commands for the game here.
1. Open the Scheduler tab
2. Click Add Another Command
3. Click the dropdown and select RCON
4. Enter a command and choose your preferred time. The timezone is UTC.
5. This command, for example, will spawn a helicopter event on a random player at 12 AM UTC.
6. Click Apply Schedule